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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 473 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.70 + 62 =
  2. 2.32 + 23 =
  3. 3.75 + 35 =
  4. 4.87 + 85 =
  5. 5.61 + 68 =
  6. 6.46 + 16 =
  7. 7.29 + 34 =
  8. 8.34 + 56 =
  9. 9.53 + 51 =
  10. 10.50 + 81 =
  11. 11.77 + 61 =
  12. 12.53 + 65 =
  13. 13.85 + 35 =
  14. 14.66 + 71 =
  15. 15.28 + 39 =
  16. 16.38 + 59 =
  17. 17.22 + 43 =
  18. 18.62 + 84 =
  19. 19.24 + 13 =
  20. 20.33 + 74 =
  21. 21.76 + 25 =
  22. 22.81 + 21 =
  23. 23.33 + 27 =
  24. 24.52 + 35 =
  25. 25.77 + 19 =
  26. 26.21 + 27 =
  27. 27.67 + 82 =
  28. 28.45 + 54 =
  29. 29.77 + 31 =
  30. 30.21 + 13 =
  31. 31.28 + 73 =
  32. 32.86 + 13 =
  33. 33.46 + 27 =
  34. 34.62 + 89 =
  35. 35.54 + 41 =
  36. 36.71 + 15 =
  37. 37.50 + 79 =
  38. 38.31 + 25 =
  39. 39.61 + 31 =
  40. 40.34 + 68 =

Answer key

  1. 132
  2. 55
  3. 110
  4. 172
  5. 129
  6. 62
  7. 63
  8. 90
  9. 104
  10. 131
  11. 138
  12. 118
  13. 120
  14. 137
  15. 67
  16. 97
  17. 65
  18. 146
  19. 37
  20. 107
  21. 101
  22. 102
  23. 60
  24. 87
  25. 96
  26. 48
  27. 149
  28. 99
  29. 108
  30. 34
  31. 101
  32. 99
  33. 73
  34. 151
  35. 95
  36. 86
  37. 129
  38. 56
  39. 92
  40. 102

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